Ep. 6: Kai confronts Quatre Knight Olivier Gaillard in a dimension of blue flames.
Kai visits Card Shop PSY to find clues about Aichi's disappearance and meets Olivier Gaillard, the Vanguard European Circuit champion. Although Kai initially believes Gaillard is an ally, he learns he is one of the Quatre Knights and is ordered to stop his search. Kai refuses, leading Gaillard to trap him in the Holy Prominence Prison, a separate dimension surrounded by blue flames. Inside, Gaillard uses Aichi's Gold Paladin deck, claiming to have inherited Aichi's will. Despite Kai's efforts, Gaillard defeats him, passing Judgment and inflicting direct damage. Gaillard asserts that he has instilled fear in Kai and warns that he and the other three Quatre Knights will continue attacking Kai and his friends to prevent them from finding Aichi, who is in a deep slumber. After Gaillard departs, Kai attempts to warn everyone but faints.
Episodes
- Ep. 2 · Kai uses Legion to summon Blaster Blade Seeker and help Misaki remember Aichi during their cardfight.
- Ep. 3 · Kai and Misaki worry about Aichi while Naoki faces Moress Pennyworth at Miyaji Academy
- Ep. 4 · Kai attempts to restore Ren and Miwa's memories of Aichi through cardfighting and a new challenge.
- Ep. 5 · Naoki Challenges Kamui to Restore Aichi's Memories Through a Cardfight
- Ep. 6 · Kai confronts Quatre Knight Olivier Gaillard in a dimension of blue flames.
- Ep. 7 · Kai warns friends while Naoki loses a cardfight against Phillip Neve at Hitsue High School.
- Ep. 8 · Kai challenges Kamui to a cardfight to fight the Quatre Knights alone.
- Ep. 9 · Kenji Faces Rati Curti in a Cardfight Before Quatre Knights Reveal Themselves
- Ep. 10 · Misaki battles Rati in the Fairy Masquerade Prison while defending her friendship with Aichi.